Abstract
In the Higgs portal framework, the Higgs field generally mixes with the Standard Model (SM) singlet leading to the existence of two states, one of which is identified with the 125 GeV scalar observed at the LHC. In this work, we analyse direct and indirect constraints on the second mass eigenstate and the corresponding mixing angle. The existence of the additional scalar can be beneficial as it can stabilise the otherwise-metastable electroweak vacuum. We find parameter regions where all of the bounds, including the stability constraints, are satisfied. We also study prospects for observing the decay of the heavier state into a pair of the 125 GeV Higgs-like scalars.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
V. Silveira and A. Zee, SCALAR PHANTOMS, Phys. Lett. B 161 (1985) 136 [INSPIRE].
R. Schabinger and J.D. Wells, A Minimal spontaneously broken hidden sector and its impact on Higgs boson physics at the large hadron collider, Phys. Rev. D 72 (2005) 093007 [hep-ph/0509209] [INSPIRE].
B. Patt and F. Wilczek, Higgs-field portal into hidden sectors, hep-ph/0605188 [INSPIRE].
D. O’Connell, M.J. Ramsey-Musolf and M.B. Wise, Minimal Extension of the Standard Model Scalar Sector, Phys. Rev. D 75 (2007) 037701 [hep-ph/0611014] [INSPIRE].
V. Barger, P. Langacker, M. McCaskey, M.J. Ramsey-Musolf and G. Shaughnessy, LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet, Phys. Rev. D 77 (2008) 035005 [arXiv:0706.4311] [INSPIRE].
D. Bertolini and M. McCullough, The Social Higgs, JHEP 12 (2012) 118 [arXiv:1207.4209] [INSPIRE].
C. Englert, J. Jaeckel, V.V. Khoze and M. Spannowsky, Emergence of the Electroweak Scale through the Higgs Portal, JHEP 04 (2013) 060 [arXiv:1301.4224] [INSPIRE].
E. Gabrielli et al., Towards Completing the Standard Model: Vacuum Stability, EWSB and Dark Matter, Phys. Rev. D 89 (2014) 015017 [arXiv:1309.6632] [INSPIRE].
D. Buttazzo et al., Investigating the near-criticality of the Higgs boson, JHEP 12 (2013) 089 [arXiv:1307.3536] [INSPIRE].
F. Bezrukov, M.Y. Kalmykov, B.A. Kniehl and M. Shaposhnikov, Higgs Boson Mass and New Physics, JHEP 10 (2012) 140 [arXiv:1205.2893] [INSPIRE].
S. Alekhin, A. Djouadi and S. Moch, The top quark and Higgs boson masses and the stability of the electroweak vacuum, Phys. Lett. B 716 (2012) 214 [arXiv:1207.0980] [INSPIRE].
O. Lebedev and A. Westphal, Metastable Electroweak Vacuum: Implications for Inflation, Phys. Lett. B 719 (2013) 415 [arXiv:1210.6987] [INSPIRE].
O. Lebedev, On Stability of the Electroweak Vacuum and the Higgs Portal, Eur. Phys. J. C 72 (2012) 2058 [arXiv:1203.0156] [INSPIRE].
J. Elias-Miro, J.R. Espinosa, G.F. Giudice, H.M. Lee and A. Strumia, Stabilization of the Electroweak Vacuum by a Scalar Threshold Effect, JHEP 06 (2012) 031 [arXiv:1203.0237] [INSPIRE].
G.M. Pruna and T. Robens, Higgs singlet extension parameter space in the light of the LHC discovery, Phys. Rev. D 88 (2013) 115012 [arXiv:1303.1150] [INSPIRE].
D. Lopez-Val and T. Robens, Δr and the W-boson mass in the singlet extension of the standard model, Phys. Rev. D 90 (2014) 114018 [arXiv:1406.1043] [INSPIRE].
T. Robens and T. Stefaniak, Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1, Eur. Phys. J. C 75 (2015) 104 [arXiv:1501.02234] [INSPIRE].
S. Profumo, M.J. Ramsey-Musolf, C.L. Wainwright and P. Winslow, Singlet-catalyzed electroweak phase transitions and precision Higgs boson studies, Phys. Rev. D 91 (2015) 035018 [arXiv:1407.5342] [INSPIRE].
C.-Y. Chen, S. Dawson and I.M. Lewis, Exploring resonant di-Higgs boson production in the Higgs singlet model, Phys. Rev. D 91 (2015) 035015 [arXiv:1410.5488] [INSPIRE].
V. Martin-Lozano, J.M. Moreno and C.B. Park, Resonant Higgs boson pair production in the \( hh\to b\overline{b}WW\to b\overline{b}{\ell}^{+}\nu {\ell}^{-}\overline{\nu} \) decay channel, arXiv:1501.03799 [INSPIRE].
C. Englert, T. Plehn, D. Zerwas and P.M. Zerwas, Exploring the Higgs portal, Phys. Lett. B 703 (2011) 298 [arXiv:1106.3097] [INSPIRE].
C. Englert, M. Spannowsky and C. Wymant, Partially (in)visible Higgs decays at the LHC, Phys. Lett. B 718 (2012) 538 [arXiv:1209.0494] [INSPIRE].
J.M. No and M. Ramsey-Musolf, Probing the Higgs Portal at the LHC Through Resonant di-Higgs Production, Phys. Rev. D 89 (2014) 095031 [arXiv:1310.6035] [INSPIRE].
O. Lebedev and H.M. Lee, Higgs Portal Inflation, Eur. Phys. J. C 71 (2011) 1821 [arXiv:1105.2284] [INSPIRE].
M. Gonderinger, H. Lim and M.J. Ramsey-Musolf, Complex Scalar Singlet Dark Matter: Vacuum Stability and Phenomenology, Phys. Rev. D 86 (2012) 043511 [arXiv:1202.1316] [INSPIRE].
V.V. Khoze, C. McCabe and G. Ro, Higgs vacuum stability from the dark matter portal, JHEP 08 (2014) 026 [arXiv:1403.4953] [INSPIRE].
S. Moch, Precision determination of the top-quark mass, PoS(LL2014)054 [arXiv:1408.6080] [INSPIRE].
ALEPH, DELPHI, L3, OPAL, SLD, LEP Electroweak Working Group, SLD Electroweak Group, SLD Heavy Flavour Group collaboration, S. Schael et al., Precision electroweak measurements on the Z resonance, Phys. Rept. 427 (2006) 257 [hep-ex/0509008] [INSPIRE].
CDF, D0 collaboration, T.E.W. Group, 2012 Update of the Combination of CDF and D0 Results for the Mass of the W Boson, arXiv:1204.0042 [INSPIRE].
Particle Data Group collaboration, J. Beringer et al., Review of Particle Physics (RPP), Phys. Rev. D 86 (2012) 010001 [INSPIRE].
ALEPH, DELPHI, L3, OPAL, LEP Electroweak collaboration, S. Schael et al., Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP, Phys. Rept. 532 (2013) 119 [arXiv:1302.3415] [INSPIRE].
Gfitter Group collaboration, M. Baak et al., The global electroweak fit at NNLO and prospects for the LHC and ILC, Eur. Phys. J. C 74 (2014) 3046 [arXiv:1407.3792] [INSPIRE].
J.D. Wells, TASI lecture notes: Introduction to precision electroweak analysis, hep-ph/0512342 [INSPIRE].
ATLAS collaboration, Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector, Phys. Rev. D 90 (2014) 112015 [arXiv:1408.7084] [INSPIRE].
ATLAS collaboration, Search for Scalar Diphoton Resonances in the Mass Range 65 − 600 GeV with the ATLAS Detector in pp Collision Data at \( \sqrt{s}=8 \) TeV, Phys. Rev. Lett. 113 (2014)171801 [arXiv:1407.6583] [INSPIRE].
CMS collaboration, Observation of the diphoton decay of the Higgs boson and measurement of its properties, Eur. Phys. J. C 74 (2014) 3076 [arXiv:1407.0558] [INSPIRE].
ATLAS collaboration, Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector, Phys. Rev. D 91 (2015) 012006 [arXiv:1408.5191] [INSPIRE].
CMS collaboration, Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV, arXiv:1412.8662 [INSPIRE].
LHC Higgs Cross Section Working Group collaboration, S. Dittmaier et al., Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables, arXiv:1101.0593 [INSPIRE].
CMS collaboration, Measurement of the properties of a Higgs boson in the four-lepton final state, Phys. Rev. D 89 (2014) 092007 [arXiv:1312.5353] [INSPIRE].
ATLAS collaboration, Search for a high-mass Higgs boson in the H → WW → lνlν decay channel with the ATLAS detector using 21 fb −1 of proton-proton collision data, ATLAS-CONF-2013-067 (2013).
CMS collaboration, Search for resonant HH production in 2gamma+2b channel, CMS-PAS-HIG-13-032 (Search for resonant HH production in 2gamma+2b channel).
CMS collaboration, Search for di-Higgs resonances decaying to 4 bottom quarks, CMS-PAS-HIG-14-013 (Search for di-Higgs resonances decaying to 4 bottom quarks).
ATLAS collaboration, Search For Higgs Boson Pair Production in the \( \gamma \gamma b\overline{b} \) Final State using pp Collision Data at \( \sqrt{s}=8 \) TeV from the ATLAS Detector, Phys. Rev. Lett. 114 (2015)081802 [arXiv:1406.5053] [INSPIRE].
LEP Working Group for Higgs boson searches, ALEPH, DELPHI, L3, OPAL collaboration, R. Barate et al., Search for the standard model Higgs boson at LEP, Phys. Lett. B 565 (2003) 61 [hep-ex/0306033] [INSPIRE].
DELPHI collaboration, P. Abreu et al., Search for low mass Higgs bosons produced in Z0 decays, Z. Phys. C 51 (1991) 25 [INSPIRE].
LHCb collaboration, Differential branching fraction and angular analysis of the B + → K + μ + μ − decay, JHEP 02 (2013) 105 [arXiv:1209.4284] [INSPIRE].
Belle collaboration, J.-T. Wei et al., Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B → K * ℓ + ℓ −, Phys. Rev. Lett. 103 (2009) 171801 [arXiv:0904.0770] [INSPIRE].
BaBar collaboration, J.P. Lees et al., Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Γ(1S), Phys. Rev. D 87 (2013) 031102 [arXiv:1210.0287] [INSPIRE].
K. Schmidt-Hoberg, F. Staub and M.W. Winkler, Constraints on light mediators: confronting dark matter searches with B physics, Phys. Lett. B 727 (2013) 506 [arXiv:1310.6752] [INSPIRE].
M. Heikinheimo, A. Racioppi, M. Raidal and C. Spethmann, Twin Peak Higgs, Phys. Lett. B 726 (2013) 781 [arXiv:1307.7146] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1502.01361
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Falkowski, A., Gross, C. & Lebedev, O. A second Higgs from the Higgs portal. J. High Energ. Phys. 2015, 57 (2015). https://doi.org/10.1007/JHEP05(2015)057
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP05(2015)057